and hell! there are more! even these (i doubt these inventions really exist):

-Screen window for a submarine-Helicopter with an injection seat-Inflatable dart board-A tape on how to put together a vcr-The water proof tea bag-Water proof towel-A book on how to read-A dictionary index-Powdered water-Pedal-powered wheel chair

and hell! there are more! even these (i doubt these inventions really exist):

-Screen window for a submarine-Helicopter with an injection seat-Inflatable dart board-A tape on how to put together a vcr-The water proof tea bag-Water proof towel-A book on how to read-A dictionary index-Powdered water-Pedal-powered wheel chair